These sorts of bot accounts are almost always 'paid' with using 7-day SoR trials or with false credit card information that gets rescinded after a short time. Blizzard gains exactly zero dollars from them.

Just wanted to comfirm; On my mostly dead realm, at this time, I can see 4 pally bots, all 4 are level 80.
Now, to go to the enterance and wreack some havoc on alliance, since im on a pvp realm

(Slightly Useless) Edit: Just flew there. It seems that, when entering the instance, they are using some form of a wall exploit, making it hard/near impossible to kill them like this.

We just murdered them as they landed at the vendor in Cosmowrench. Also if you go check your CRZ zoned auction houses ( Darnassus for Ally and UC for Horde) you will see level 3 or lower, usually hunters, selling for this same botter.